Add GitHub workflow for Copilot coding agent environment setup using pre-built container

.github/workflows/copilot-environment.yml

@@ -0,0 +1,119 @@
+name: Copilot Environment Setup
+
+# This workflow sets up the development environment for GitHub Copilot coding agent
+# It leverages the existing devcontainer configuration to ensure consistency
+# with the development environment and avoid duplication of tooling setup
+#
+# The workflow:
+# - Uses the same base container image as the devcontainer (mcr.microsoft.com/devcontainers/rust)
+# - Runs the devcontainer post-create script for environment setup
+# - Installs the same development tools specified in the devcontainer
+# - Caches Cargo dependencies for improved performance
+# - Runs comprehensive workspace verification (check, clippy, fmt)
+# - Tests basic functionality to ensure the environment is ready
+#
+# This approach maintains consistency with the existing devcontainer setup
+# and avoids maintaining duplicate tool installation logic
+#
+# Triggers:
+# - Manual execution via workflow_dispatch 
+# - Weekly scheduled runs to keep environment fresh
+# - Automatic runs when key configuration files change
+
+on:
+  workflow_dispatch: # Allow manual triggering
+  schedule:
+    # Run weekly to keep the environment fresh
+    - cron: '0 2 * * 1' # Monday at 2 AM UTC
+  push:
+    branches: [main]
+    paths:
+      - 'rust-toolchain.toml'
+      - 'Cargo.toml'
+      - '.devcontainer/**'
+      - '.github/workflows/copilot-environment.yml'
+
+jobs:
+  setup-environment:
+    name: Setup Copilot Coding Agent Environment
+    runs-on: ubuntu-latest
+    container:
+      image: mcr.microsoft.com/devcontainers/rust:1-1-bullseye
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup development environment using devcontainer configuration
+        run: |
+          # Run the devcontainer post-create script to set up the environment
+          # This uses the same setup as the existing devcontainer
+          chmod +x .devcontainer/oncreate
+          ./.devcontainer/oncreate
+
+      - name: Install additional tools from devcontainer
+        run: |
+          # Install the same tools as specified in the devcontainer Dockerfile
+          cargo install cargo-watch http-server
+
+          # Install tools commonly needed for Rust development and Azure SDK
+          cargo install cargo-audit || echo "cargo-audit already installed or failed to install"
+          cargo install cargo-outdated || echo "cargo-outdated already installed or failed to install"
+
+      - name: Cache Cargo dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+
+      - name: Verify workspace setup
+        run: |
+          # Verify the workspace can be built
+          cargo check --workspace --all-targets
+
+          # Run basic linting
+          cargo clippy --workspace --all-targets -- -D warnings
+
+          # Check formatting
+          cargo fmt --all -- --check
+
+      - name: Setup environment variables
+        run: |
+          echo "RUST_BACKTRACE=1" >> $GITHUB_ENV
+          echo "CARGO_TERM_COLOR=always" >> $GITHUB_ENV
+          echo "RUSTFLAGS=-D warnings" >> $GITHUB_ENV
+
+      - name: Test basic functionality
+        run: |
+          # Test that we can run basic cargo commands
+          cargo --version
+          cargo tree --workspace | head -20
+
+          # Verify that tests can be discovered
+          cargo test --workspace --no-run
+
+      - name: Environment summary
+        run: |
+          echo "=== Rust Environment Summary ==="
+          rustc --version
+          cargo --version
+          echo "=== Installed Components ==="
+          rustup component list --installed
+          echo "=== Available Tools ==="
+          which cargo-audit && cargo-audit --version || echo "cargo-audit not available"
+          which cargo-outdated && cargo-outdated --version || echo "cargo-outdated not available"
+          which cargo-watch && cargo-watch --version || echo "cargo-watch not available"
+          which http-server && http-server --version || echo "http-server not available"
+          echo "=== System Dependencies ==="
+          openssl version
+          pkg-config --exists openssl && echo "OpenSSL pkg-config: OK" || echo "OpenSSL pkg-config: NOT FOUND"
+          echo "=== Workspace Structure ==="
+          find . -name "Cargo.toml" | head -10
+          echo "=== Environment Ready for Copilot Coding Agent ==="

.vscode/cspell.json

@@ -45,6 +45,7 @@
     "dotenv",
     "downcasted",
     "downcasting",
+    "dtolnay",
     "entra",
     "etag",
     "eventhub",
@@ -153,6 +154,12 @@
         "rust-custom"
       ]
     },
+    {
+      "filename": ".github/workflows/*.yml",
+      "dictionaries": [
+        "rust-custom"
+      ]
+    },
     {
       "filename": "sdk/core/azure_core_amqp/**",
       "dictionaries": [